Not sure when the leaves will be done turning but the drive up to cripple creek is pretty this time of the year. Can do the train up there.
Garden of the Gods and red rocks is always a good option for outdoor activities if the weather is decent. Get to garden of the gods early for parking. Although usually not as much a **** show as it is in the summer.
Not sure if you're coming from TX or not but if you want some pretty solid bbq checkout chuck wagon (
https://www.chuckwagon719.com) best bbq in town and some of the best in the state. There'll be a line but it moves fast. Sunday brunch at the broadmoor is a good time. Golden bee is fun decent food but fun atmosphere. Rabbit hole is a good spot but maybe not so much with the kids though. Greenline is a solid burger.